QuillBot vs Undetectable AI:Which is searched more?
In September 2026, QuillBot had more branded searches than Undetectable AI among AI humanizer tools worldwide. QuillBot had about 71,700 branded searches, while Undetectable AI had 15,000. QuillBot made up 9.8% of all AI humanizer tool searches we track, and Undetectable AI accounted for 2.1%. These are worldwide searches for English-language branded terms.
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Is QuillBot or Undetectable AI more popular in search?
Compare the tools that rewrite AI-generated text so it reads more like a person wrote it. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time.
Share of searches by month for QuillBot, Undetectable AI. The figures are in the table below the chart.
View monthly share of searches table
| Month | Humbot | StealthWriter | Grubby AI | BypassGPT | QuillBot | Phrasly | WriteHuman | HIX Bypass | Undetectable AI | Walter Writes | Humanize AI Pro |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 17.8% | 14.6% | 6.6% | 32.6% | 9% | 1.3% | 5.4% | 9.8% | 1.2% | 1.3% | 0.39% |
| Nov 2025 | 16.6% | 16.6% | 16.6% | 24.8% | 7.4% | 1.2% | 5% | 9.1% | 1.1% | 1.5% | 0.3% |
| Dec 2025 | 21.2% | 17.4% | 11.6% | 21.2% | 8.5% | 1.3% | 5.2% | 9.5% | 1.7% | 1.9% | 0.38% |
| Jan 2026 | 23.5% | 19.3% | 10.6% | 19.3% | 7.9% | 1.4% | 4.7% | 7.1% | 3.5% | 2.1% | 0.42% |
| Feb 2026 | 20.1% | 16.5% | 9.1% | 9.1% | 25.1% | 1.5% | 4.1% | 4.1% | 8.4% | 1.8% | 0.36% |
| Mar 2026 | 19.9% | 19.9% | 10.9% | 10.9% | 22.3% | 1.8% | 4% | 4% | 3.6% | 2.2% | 0.36% |
| Apr 2026 | 17.3% | 21.2% | 14.2% | 11.6% | 9.9% | 2.9% | 4.3% | 4.3% | 2.6% | 2.3% | 9.5% |
| May 2026 | 16.4% | 16.4% | 11% | 11% | 30.6% | 2.7% | 3.3% | 4% | 2.4% | 1.8% | 0.44% |
| Jun 2026 | 17.7% | 11.9% | 6.5% | 6.5% | 43.9% | 2.4% | 2.9% | 3.6% | 3% | 1.3% | 0.39% |
| Jul 2026 | 17.2% | 11.5% | 5.2% | 5.2% | 43.5% | 1.9% | 2.3% | 2.3% | 9.7% | 1% | 0.3% |
| Aug 2026 | 16% | 10.7% | 5.9% | 8.8% | 48.4% | 2.2% | 2.6% | 2.2% | 2% | 0.96% | 0.35% |
| Sep 2026 | 27.5% | 18.5% | 15.1% | 12.4% | 9.8% | 4.5% | 4.5% | 3% | 2.1% | 2% | 0.6% |
How has the QuillBot and Undetectable AI comparison changed over the last 12 months?
3 findings
- QuillBot was ahead of Undetectable AI in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, QuillBot’s share of searches among AI humanizer tools worldwide moved from 9% to 9.8%, and its estimated monthly branded searches moved from 124K to 71.7K.
- Across the 12 months ending September 2026, Undetectable AI’s share of searches among AI humanizer tools worldwide moved from 1.2% to 2.1%, and its estimated monthly branded searches moved from 16.7K to 15K.
How did search popularity change for AI humanizer tools worldwide in September 2026?
5 changes
In September 2026, Humbot overtook QuillBot to become the leader among AI humanizer tools worldwide, with 27.5% of the searches.
In September 2026, StealthWriter overtook QuillBot to rank 2nd among AI humanizer tools worldwide, with 18.5% of the searches.
In September 2026, Grubby AI overtook QuillBot and BypassGPT to rank 3rd among AI humanizer tools worldwide, with 15.1% of the searches.
In September 2026, QuillBot lost share of searches among AI humanizer tools worldwide, from 48.4% to 9.8%.
Estimated monthly branded searches for Undetectable AI worldwide fell 10.2% over 12 measured months, from 16.7K to 15K in September 2026.
How are branded searches counted?
4 search terms
Brandwave collects information about searches that people make online using QuillBot’s and Undetectable AI’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
QuillBot
2 branded search terms
- quillbot ai humanizer
- quillbot humanizer
Undetectable AI
2 branded search terms
- undetectable ai detector
- undetectable ai humanizer
Other head-to-heads among AI humanizer tools
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